The New YorkerFacebook Aims to Shrink Google's Lead in Digital AdsWall Street JournalGoogle will take 32% of the $120 billion global digital ad market this year, ... Facebook is second with an estimated 8% share this year. ... relaunched Atlas, an advertising system it bought last year from Microsoft Corp. ... other required tracking technology such asApple's Identifier for Advertisers, or IDFA, ...